there is no problem with imported sibling App.vue, but there is a problem with subordinate directories such as the vue file in components. I analyzed for a long time that it was estimated to be the problem of webpack module parsing, but I couldn"t find a solution.
Project Directory
webpack
webpack
look at components this package name, when you introduce it, it is spelled as componets
I think the structure should be.. / components/copyedComponets/line.vue, usually IDE will prompt, according to the prompt to import must be OK.
pay attention to whether there is something wrong with the directory when writing code without prompting you